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Old 02-10-2014, 02:23 PM   #1
JulianDelphiki
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Member#: 307912
Join Date: Jan 2012
Chapter/Region: South East
Location: FL
Vehicle:
1997 OBS V8 Ej207
Stimikey tuned

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I was experiencing some lag issues with my vf37(I have a V8 motor) and heard that exhaust wrap can reduce lag and possibly give you more power. Hotter air moves faster and keeps the turbo spooled. Here are some virtual dyno results done on the same stretch of road with temperature and barometric pressure changed accordingly. I did this to show the real gains from $100 worth of wrap. Again keep in mind I had no heatshields on my headers or turbo before I started this.
So I took a log of my current setup which was no wrap or heatshield on header, uppipe or the turbo/dp. That is my first and lowest log/dyno. Saved as "no wrap"
Next I wrapped my header and uppipe using dei titatium wrap. That log is labeled "Header wrap"
Yesterday I put on the dei turbo blanket(part number 15003) and a modified td04 heat shield. That log is labeled "Turbo wrap"



As you can see the lag was greatly reduced as full boost was achieved 400rpms sooner. Not to mention the power gains which I am assuming came from the now non-heatsoaked TMIC. I plan to wrap the two foot section after the turbo on the dp later today.
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Last edited by JulianDelphiki; 02-10-2014 at 05:34 PM.
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Old 02-10-2014, 03:30 PM   #2
VladiWrX
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Lag was greatly reduced because you started the last pull way earlier.
Also you have different weights and temps in the different logs.
Also I don't think I'm the only one that thinks nearly 50whp from some wrap and heat shields is even remotely realistic lol

I think maybe 5-10whp would be quite good, if not even optimistic, and about 100-200rpm worth of spool. But 50? lol

Last edited by VladiWrX; 02-10-2014 at 04:17 PM.
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Old 02-10-2014, 03:59 PM   #3
freddy121389
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DGM 301whp 335wtq

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How the hell do you have lag issues with a stock sized twin scroll turbo?
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Old 02-10-2014, 04:45 PM   #4
JulianDelphiki
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Member#: 307912
Join Date: Jan 2012
Chapter/Region: South East
Location: FL
Vehicle:
1997 OBS V8 Ej207
Stimikey tuned

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Quote:
Originally Posted by VladiWrX View Post
Lag was greatly reduced because you started the last pull way earlier.
Also you have different weights and temps in the different logs.
Also I don't think I'm the only one that thinks nearly 50whp from some wrap and heat shields is even remotely realistic lol

I think maybe 5-10whp would be quite good, if not even optimistic, and about 100-200rpm worth of spool. But 50? lol
-Correct, I did start the last run sooner. The largest change was in the 1st and 2nd runs though and that was started at the same rpm.
-The weights were changed because on one run my 100lb gf was with me.
-Again the temps and barometric pressure were changed because the runs were done days apart(I thought I mentioned something about that in my first post)

I am just showing the data I collected. Believe what you chose, however the reason I started wrapping was because I had zero shielding on the car....just exposed pipes. I felt those gains.
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Old 02-10-2014, 04:47 PM   #5
JulianDelphiki
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Member#: 307912
Join Date: Jan 2012
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Location: FL
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1997 OBS V8 Ej207
Stimikey tuned

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And done.
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Old 02-13-2014, 01:55 PM   #6
zDusza
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Thanks for sharing these results, I've always heard wraps and shields were a good thing to have. It's nice hearing from someone else that they work well.
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Old 02-13-2014, 05:32 PM   #7
subiFKNpowers
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Location: Eastbound and Down
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06 TR VF39/E85
Graphite & Carbonfiber

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Nice man... what type of wrap did you choose? i got the lava heat wrap and lava turbo blanket for my vf39. The turbo blanket dramatically dropped under hood temps. I havent had time to do the wrap on the down pipe.
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Old 02-13-2014, 05:38 PM   #8
JulianDelphiki
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Member#: 307912
Join Date: Jan 2012
Chapter/Region: South East
Location: FL
Vehicle:
1997 OBS V8 Ej207
Stimikey tuned

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Dei titanium wrap. It's much easier to work with. Also thanks for the kind words.
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